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company news / 公司新聞
According to a report by NHK TV on November 21, Tokyo Electric Power Co., a water treatment equipment manufacturer, launched a test run of a system of multi-nuclide removal equipment (ALPS) at Fukushima No. 1 nuclear power plant on November 21. Trial work on the system was halted in June because of leakage of nuclear sewage caused by corrosion. After the test was restarted on the 21st, all three systems of multi-nuclide removal equipment entered the test operation status.
Multi-nuclide removal equipment is a new equipment for treating nuclear wastewater. It is thought that it can remove 62 kinds of radioactive substances besides tritium. It will play a key role in the treatment of nuclear wastewater. However, in June 2013, among the three systems put into trial work, one system of water storage tanks leaked nuclear sewage due to corrosion, and the trial work was stopped. Thereafter, TEPCO has been discussing ways to avoid corrosion. So far, the two systems that have completed the anti-corrosion work have started the trial work one after another, and the trial work of the final system of Hangzhou water treatment equipment has also started today.
According to the leakage of Dongdian Power Company, four radioactive substances, such as cobalt and antimony, have not been completely removed in the trial work so far, and then the decision will be made to improve the decontamination function of the equipment together with the recognition of the role of anticorrosive measures. To this end, the formal work of the three systems of multi-nuclide removal equipment will begin in the next year, much later than the original plan to start formal work this autumn. Tokyo Electric Power Company (TEPCO) has decided to install nuclear sewage disposal equipment next year, and dispose of nuclear sewage from nuclear sewage storage tanks in the nuclear power plant area by the end of next year, that is, March 2015.